<template>
  <el-container class="home_container">
    <!-- 头部 -->
    <el-header>
      <div>
        <span>电商后台管理系统</span>
      </div>
      <!-- 退出登录 -->
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu background-color="rgb(50,55,68)"  text-color="#fff" active-text-color="#409BFF" unique-opened
        :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单模版区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
            @click="saveNavState('/'+subItem.path)">
              <template slot="title"> 
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 主体 -->
      <el-main>
        <!-- 路由出口 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  name: 'MyHome',
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem("activePath")
  },
  data() {
    return {
      // 侧边栏菜单数据
      menulist:[],
      // 图标
      iconObj:{
        "125":"iconfont icon-user",
        '103':"iconfont icon-tijikongjian",
        '101':"iconfont icon-shangpin",
        '102':"iconfont icon-danju",
        '145':"iconfont icon-baobiao",
      },
      // 是否折叠
      isCollapse:false,
      // 定义激活的链接
      activePath:""
    }
  },
  methods: {
    // 退出按钮 回到登录界面
    logout() {
      // 清空
      window.sessionStorage.clear()
      // 编程式路由导航
      this.$router.push("/login")
    },
    // 获取所有菜单
    async getMenuList(){
      const {data:res} = await this.$http.get("menus")
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      // if()
      this.menulist = res.data
    },
    // 点击按钮折叠菜单
    toggleCollapse(){
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem("activePath",activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang='less' scoped>
.home_container {
  height: 100%;
}

.el-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 30px;
  color: #fff;
  background-color: rgb(55, 60, 65);
}

.el-aside {
  background-color: rgb(50, 55, 68);
  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: rgb(234, 237, 242);
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
